I've prepared a standalone version of Corona to run a prepared scene with a reference configuration, and report the rendering time. It is a nice demo of Corona capabilities, and you can use it to judge how fast can your computer run Corona, and what would you gain by upgrading it

You can download it here, to run it, simply download, unpack, run the .bat file:

It runs for about 5-15 minutes on most computers, then it will pop up windows with copypastable info (and save image to its folder). To get best results, you should not perform any CPU-heavy operations while it is running

Feel free to post your test results

Copyright notice: The model and textures are property of its authors, and it is forbidden to use them outside of this application.

Disclaimer about the speed of the rendering, since many people discuss if the scene is somehow "cheated": The rendering runs in a partially biased mode with partial lighting interpolation (irradiance caching/light caching-style) enabled, it is not pure path tracing nor unbiased. The settings are slightly tweaked to achieve best performance (about 3 parameters are changed, because by default they are set defensively to allow reasonable rendering of much more complex scenes), and the scene uses portal lighting. Any professional Corona user would be able to tweak the scene the same way. The scene is a real scene created by an artist, with not subsequent tweaking such as removal of geometry. Effect of turning portals on/off is shown here